Re: export a schema / import as new schema

On 2009-08-21, David Kerr <dmk(at)mr-paradox(dot)net> wrote:
> On Fri, Aug 21, 2009 at 12:00:11PM -0700, Joshua D. Drake wrote:
> - On Fri, 2009-08-21 at 11:56 -0700, David Kerr wrote:
> - > Is there an easy way, that I'm missing, where I can export a schema from
> - > database A and then rename it on load into database B?
> -
> - pg_dump -s foo|psql bar
>
> Sorry, I wasn't clear.
>
> What I have is:
>
> [Database 1].[Schema 1]->[Data Set 1]
> [Database 2].[Schema 1]->[Data Set 2]
>
> What I want to do is:
>
> Export [Database 1].[Schema 1]->[Data Set 1]
> Import [Database 2].[Schema 2]->[Data Set 1]
>
> Leaving me with
> [Database 2].[Schema 1]-[Data Set 2]
> [Schema 2]-[Data Set 1]
>
> So that i can now compare Data Set 1 and Data Set 2
>
> Currently, I'm creating the new schema in database 1 and then exporting that data
> into database 2, but i was hoping there was a better way.

you just need a little sed magic, (untested)

pg_dump -s schema1 database1 |
sed '/^COPY/ /\\./ { p;d } ;
s/^SET search_path = schema1,/^SET search_path = schema2,/;
s/ schema1\./ schema2\./;
s/ SCHEMA schema1 / SCHEMA schema2 /;
'|
psql database2

if you need mixed case,spaces,punctuation,etc in the names it's a
little harder